Inter



Nov; l, 1927.

L. M. WOOLSON RNAL coMBUsTIoN ENGINE INTE dan"

Patented Nov. 1, 1927.

UNITED STATES LIONEL PATENT OFFICE.

M. WOOLSON, F DETROIT, `MICHIGAN, ASSTGNOR T0' JLCKAIRDy MOTOR CARv j COMPANY, OF DIETE/OIT,` MICHIGAN, A CORPORATION OF MICHIGAN.

INTERNAL-COMBUSTION ENGINE.

Appneannn inea April e,

This invention relates to internal combustion engines and particularly to the con ,struction of the cylinder and head parts of theengine.

One of the objects of the invention is to provide a thin wall between the combustion chamber andthe water jacket so that the heat maybe more readily transferred to the water in the jacket.

v Another object of the invention is to provide a cylinder head with a sheet metal wall for the inner part of the jacket to 'therebyV facilitate the casting of the jacket and for other purposes. j

Another object of the invention is to providea sheet metal wall for the combustion chamber to obtain manufacturing.and struc-- tural advantages. Y

Other objects of the invention will appear from the followingv description taken in connection with the drawings, which form a part of this specification7 and in which:

, Fig. 1 is a vertical section, partly on the line 1-1 of Fig. 2 and partly onthe line Fig. `2 is a vertical transverse section through the engine shown in Fig. 1;

j AFigi), is a perspective view of the sheet metal `combustion chamber wall illustrated inthe other figures;

i Fig. l is an enlarged detail view showing' a second forni of connection between the sheet metal wall and the cylinder head casting. j

n Referringto the drawings 10 represents a cylinder block which `may comprise oneor severall cylinders. In the form shown therel `are several cylinders 11 which are open at the combustion endv and which are provided Vwith inlet and exhaust Valves 12.l The uppervend of the cylinder block is machined ojfi' flat Vas shown in Figs. 1 and 2 to receive a cylinder head 13 which is detachably con-y nected to the cylinder block as by a series of bolts 14.

Y The cylinder head 13 comprises two principal parte, a casting 15 which has an outer vrwall l16,`and a sheet metal part 17 which covers the opening left in the lower face of the casting 15 and which alsofforms the wall 1922. 4 serial no. 550,021.

yofthe combustion space 18 at the upper end fof the cylinder. v17 is a water jacket 19. This sheet metal Betweenl the walls 16 and part 17 forms a thin wall betweenthe combustion spacel 18 and the water jacket 19 so 55 that the heat ont' combustion` may be rapidly dissipated to the water in the jacket 19.5

The sheet metal part 17 is bulged upwardly over the cylinders and valves to form the combustion kchambers 18, being shown as of somewhat spherical shape over the cylinders as at 20, and it is also formed withl a Harige 21 which conforms to the shape of the top of the cylinder block 10. This flange is 'arrangedto be clamped between the casting 15 of the detachable cylinder head and the cyl .inder block 1() when the bolts 14; are screwed down. There may also be gaskets 22 arranged aboverand below the flange 21 for the purpose of making a tight joint between the., flange and the parts between `which it is clamped.y j.

The cylinder block l() is also preferably water jacketed as at '23 anda series of open. ings such yas that shown in dotted linesin Fig. 2, at 24, may be provided to permitlthe water to passfrom the acket '28 in the cylinder block to the jacket 19 in the head. These openings 24. pass through the flange r21and the gaskets 22. l

For the purpose ofA inserting a spark plug through the cylinder yhead so that its inner end will be within the combustion chamber 18, thecasting 15 isformed with a downopening 27 to coincide with the inner-,end of the sleeve 26 and the sheet nietaland sleeve i are weldedvtogether as shown atk 28 in F ig. 2. The sleeve 26 is threaded interiorly to take a spark plug 29, the points 30 of which are,.by the arrangement above described,` arranged substantially central the combustion chamber 18 so that the flame` produced by the, spark plug is propagated radiallyto every part of the combustion chamber.v

In` Fig. tanother form ot connection of the sheet metal part 17 to the casting 15 is i shown. 1n this case the sheet metal part, in- 100 stead of being welded to a sleeve, is cian'iped between the sleeve 26 and the inner end ot' the boss 25, with gaskets 31, so that a gastight oint is inade. ln this case also a spark plug 29 is inserted in the sleeve.

it will be understood that various forms of the invention other than those described above may be used without departing troni the spirit or scope ot the invention.

Having thus described iny invention, what l claim and desire to secure by Letters Patent is:

l. ln an internal combustion engine, the combination with a cylinder block having an open combustion end, of a head detachably connected to the cylinder block, and a separate sheet metal part forming the upper Wall of the combustion chamber oi' the en- 'gine and clamped between the head and cylinder block.

42. ln an internal combustion engine, the combination with a cylinder block having an open combustion end, ot a head detachably connected to the cylinder block, and a stamped sheet metal liner arranged between the head and cylinder block and forming the top and side walls oi the combustion chamber.

3. n an internal combustion engine, the combination with a cylinder block having an open combustion end, of a head detachably connected to the cylinder block and coinprising inner and outer jacket walls of separatel parts, the inner jacket wall being formed of sheet metal and having parts clamped between the cylinder block and the outer-part or" the head.

4. lin an internal combustion engine, the combination with a cylinder block having an open combustion end, of a head detachably connected to the cylinder block and coniprising a casting having an outer acketwall only, and a stamping secured to the casting and forming the inner jacket wall ot' the head, said stamping also forming the ywall ot the combustion chamber.

5. ln an internal combustion engine, the combination with a cylinder block having Van open combustion end, ot a head detachably connected to the cylinder' block and comprising a casting having an outer jacket wall only, and a thin stamping secured to the feasting and forming the inner jacket wall of the head, said stamping also forming the wall of the combustion chamber and being` clamped between the head and the cylinder block.

6. An engine comprising a water jacketed head having a sheet metal wall 'forming the lcombustion chamber, said sheet metal wall being detachably secured to the cylinder proper.

7. fin an internal combustion engine, the combination with a cylinder, of a head therefor comprising casting having a water nea-melia jacket open towards the combustion chainber, said casting having a boss extending into the head and a sheet metal wall covering the o )en aart of the acket and iorinnw the wall oit the combustion chamber, and nie-ans 'for securing said sheet nieta-l wall to said boss.

8. In an internal combustion engine, the combination with a cylinder, of a head there- Jor comprising a casting having a Water jacket open towards the combustion chainber, said casting having a boss extending into the head, and a sheet ine-tal wall covering the open part of the jacket and forming the wall oi the combustion chamber, and means for detachably securing said shee metal wall' to said boss.

9. in an internal combustion engine, the combination with a cylinder having an open combustion end and having a valve arranged at one side thereof, ot a sheet metal part forming a combustion chamber over the end ot the cylinder and over said valve, a head part arranged over the sheet metal part and forming a water jacket over and around said combustion chamber, and means for detachably securing said head part to the cylinder with a portion ot the sheet metal part clamped between the head part and the cylinder.

l0. -i an internal combustion engine, the combination with a cylinder' block comprising several cylinders open at their combustion ends, ot a sheet metal part covering the coinbustion end ot' the cylinder block and coinprising parts forming the combustion chambers of the respective cylinders and parts 'forming flanges around the combustion chambers and resting against the end of the cylinder block, and a cylinder head casting arranged over said sheet metal part and forming a water jacket over and around the combustion chambers, and nieans for detachably securing said head casting to said cylinder block with the flanged part ot said sheet metal part between the head casting and the block.

1l. ln an internal combustion engine, the combination with a cylinder block comprising a plurality oiIv cylinders open at their combustion ends, ot a single sheet metal part covering the combustion ends ot a plurality of said cylinders and con'iprising bulged out portions over the ends of the cylinders and Yflanged portions around the cylinders resting against the end oi the cylinder block, and a head part arranged over said sheet metal part and forming a water jacket around the bulged out portion of said sheet metal part, and means 'lor detachably securing said head part to the cylinder block with the flanged portion ot the sheet metal part clamped between the head part and the cylinder block.

l2. in an internal combustion engine, the combination with a cylinder having an open tra combustion end, of a sheet metal part over the combustion end of the cylinder and having a portion bulged out over the cylinder end to form the combustion chamber and having a. flanged lportion around the open end of the cylinder, and a head part ar ranged over the sheet metal part and 'forming a Water jackety over and around said combustion chamber, and means for detachably securing said head part to the cylinder 10 with the flanged portion of the sheet metal part between the head part and the cylinder. In testimony whereofl I aix my signature LIONEL M. WOOLSON.- 

